Hi,
Why are you trying to optimize Windows Recovery Environment tools?
This partition allocate space for the Windows RE tools image (Winre.wim, at least 250 MB), plus enough free space so that the partition can be captured by backup utilities.
For further information, refer to the section “Windows RE Tools partition” from the article:
Configure UEFI/GPT-Based Hard Drive Partitions
http://technet.microsoft.com/en-us/library/hh824839.aspx
Since it is the Windows Recovery Partition, it is better not to optimize or defrag the drive. When your computer will not boot and need to reinstall or repair windows, you need to access the partition using this tools from Windows Recovery partition.
Hope the information helps. If you have any further issues on the computer, please post your question regarding Windows and we will be happy to help you.